Popcorn vending machine



FIG. 1 is a perspective view of the popcorn vending machine showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof, the opposite side view being the same;

FIG. 4 is a back view thereof; and,

FIG. 5 is a top plan view thereof, the bottom being unornamented.

The broken line showing on FIGS. 1-5 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a popcorn vending machine, as shown and described. 